Improvement in book-sewing machines



. 2Sheets--Sh`eet2u.V E'. G. PARKHURST 8|. H. G. THOMPSON.

Book Sewing-Machines.v

Patented June 2,1874.

No.15iv507.

UNITEDV STATES PATENT Orrrcn.

EDW'ARD G. PARKHURST, OF HARTFORD, AND HENRY G. THOMPSON, OF MILFORD, CONNECTICUT.

I IMPRO'VEMENT IN BOOK-SEWING MACHINES.

Specification forming part of Letters Patent No. 151,507, dated June 2, 1874; application filed January 24, 1874.

To al1- whom it may concern:

Be it known that we, E. G. PARKHURST, of Hartford, county of Hartford, and H. G. THOMPSON, of Milford, county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Book- Sewing Machine, of which the following is a specication Our invention relates to improvements on that for which Letters Patent No. 7 4,948 were granted February 25,1868, and No. 91,175, granted June S, 186i), to David M. Smyth; and it consists in, first, a combination of devices for raising the signature clear of the needles preparatory to being folded; second, a thread-carrier'of peculiar construction formanipulating the interlacing thread; third, a block provided with an adjustable plug for raising or lowering the needle to correspond with signatures of different thicknesses; fourth, an adjustable guide of peculiar construction for readily adjustin g the thread-carrier to the proper position for sewing signatures of different thicknesses and lengths; fifth, the combination of a bumper with the thread-carrier for facilitating the operation thereof.

In the accompanying drawings,'Figure 1 is a side elevation. Fig. 2 is a top view. Fig. 3 is a transverse vertical section taken on the line x Fig. l. Fig. 4 is arepresentation of different portions ofthe needle. Fig. 5 rep resents two of the cam-wheels. Fig. 6 represents a side view and a sectional view of the thread-carrier. Fig. 7 represents a sectional and side view of bumper. Fig. S represents a sectional view of guide a.

A represents the frame of the machine, which is constructed in any suitable manner. In the lower portion, on one side, is a shaft, B, running the entire width of the frame, and carrying three wheels, B1 B'Z B3. Above the shaft B, and nearer to the centerl of the frame, is a shaft, C, which also runs the entire width of the frame, and which forms the fulcrums for two bell-crank levers, C1 2. In the upper portion of theframe is a shaft, D, which passes eccentrically through a cylinder, E, and has its bearings in blocks d d attached to the frame. Surrounding` the cylinder E is a bloclr,fG, the upper side of which is flat, and the remaining portion is cylindrical. At each end of the block Cr is a lug, g, to each of which lugs is pivoted the upper end of a pitman, h. One pitma-n connects with the bellerank lever C1, and the other pitman connects with the bell-crank lever C2. The wheel B1 has a cam groove, b1, on one of .its sides, which groove is circular, with a depression inward toward the center. The wheel B? has a cam-groove, b3, on its side, with a projection outward toward the periphery. The bell-crank C1 engages with the wheel Bl by means of a stud working in the cam-groove b1, and the bell-crank C2 engages with the wheel B3 by means of a stud working in the cam-groove Z. One of the lugs f/ is a part of, or made fast to, the block G, and the other lug r/ is attached to the cylinder E, so,tl1at,as the shaft B is revolved, the wheel B1, through the pitman 7b and lug g, gives a rocking motion to the block G, and the wheel B3, through its pitman 7L and lug g, gives a reciprocatingrotary motion to the cylinder E. The wheel B'Z has a camgroove, b2, in its face, in which works a stud on the lower end of a straight lever,'I, which is pivoted about midway of its length to a iro-v` `jection, i, on the frame AQ The upper ent of this lever passes through an opening orl slot,- la, in the under side of the block Gr, and into a recess, k2, formed in the cylinder E. 'y (See Fig.v 3.) On the upper side of the block G rests a bar, L, secured to the block by screws m passing through slots n, so as to allow the bar to move longitudinally. About-lnidway of the length of the bar L a pin, Z, projects downward and enters a hole in the upper end of the lever I, as shown in full lines in Fig. 8, and in dotted lines in Fig. l. On the upper side of the bar L are pi voted the ends of the latches P, which have their fulcrum on a lifter or finger, Q, attached to the upper side of the block G, and its opposite end formed into a hook, pf

In the drawings but one of these latches and litters has been shown, but in a workin g machine I use one foreach of a series of nce dles.

A A series ot' needles are attached to the frame. One of these needles, S, is shown in lfig. fi. The lower end is bent and inserted in a hole in a cylindrical plug, t, held in place by a set-screw in a block, T, so that by loos- ,.ning the set-screw the plug t may be turned so as to elevate or lower the needle when required. The block T slides in a dovetailed groove in the frame, as shown in Fig. 3, for the purpose ot' adapting the machine for sewing books ot' different lengths by moving the needles ciose together or farther apart. The point or upper end of the needle projects slightly above the upper side of the lifter or finger Q,through a notch therein, as shown in Figs. 2 and 3.

The thread-carrier consists of a rod, R, working in guides ly al in the upper part of the frame A, so as to admit of a longitudinal motion, and provided with suitable means for operating it either by hand or by machinery. The guides a al are adjustable, so that the carrier-rod may be raised or lowered, when desired, by means of an eccentric, (t2. A lateral adjustment is also provided for by the slot a? and set-screw a4, in order that the thread-carrier maybe moved to and from the needle without the vertical action attendant upon the movement ofthe eccentric. In a working machine I sometimes place the guide ay upon a slide having a horizontal movement, and adjust the guide according to the length of the signature beingsewed. The forward end of the rod R is surrounded by a sleeve, R2, in which is a spiral spring, r1, pressing against a piston or follower, r2. Iivoted to the rod R is a hook, R3, the sha-nk of which is flat, and passes through a slot, 1'3,inV the sleeve. The shank has a slot, r4, cut in it at a-n angle of about forty-five degrees inclination from the axis of the rod I). A pin, 0"", passes from the sleeve through the slot r4. vWhen the rod R is pressed into the sleeve, so that its end bears against the piston r2 and compresses the spring r1, the hook R3 is forced laterally outward in consequence of the action of the pin r? in the slot r4. The outer or forward end of the sleeve R2 is bent upward at an angle ot' about thirty degrees inclination for a short distance, and then outward again parallel with the axis ot' the rod, as shown at R4. This end R4 when the rod is moved forward strikes against a bumper. The bumper V is attached to the top of the frame A opposite to the thread- 'ari-ier rod, and is made laterally adjustable by means of the slot c and screw e and the said bumperl has a face-plate, Y, (see Fi g. 7 ,l held in place by a projecting lug, y', and set-screw y, which renders the plate readily adjustable. In the face of this plate is a circular concavity, the center of which is alittle to one side ot' the center of the plate. By the proper adjustment of the plate the center of the concave is kept opposite to and receives the forward end of the sleeve RLL of the-thread-carrier rod R after every forward movement, and carries the rod to the proper position for the action of the hook Rf* in throwing the loop around the last needle. This book-sewing machine is provided witha feeding-table and folder similarto that shown in Letters Patent No. 91,175 and No. 100,407. The folded sheets that are to be connected or sewed together to constitute a book or pamphlet are' put together, and a series of notches cut across the back folded edges. The notches when so cut form holes in the sheets when opened out. The pile of sheets so notched is placed upon the feedingtable, with the notched edges toward the needles. The top signature is opened out by the attendant and slipped on the series of needles, the notches cut into the edges of the sheets forming holes to slip onto the needles when the sheets are opened out. The thread-carrier is then. moved forward, the hook R3 catching the loop in the thread of the feeding-needle and carrying it along until it is opposite the last needle, when the end R4 comes in contact with the bumper V, which arrests the motion of the sleeve R2. The motion. of the rod R is continued, the end pressing against the piston r2 and forcing thc hook R3 laterally outward, so as to throw the loop around the last needle. The thread-carrier is then moved back to its former position, and as the shaft B revolves the lifters Q raise the signatures clear of the needles, the hook on the point of the last needle catching the interlacing thread and preventing it from slipping oft' the needle, when the folders of the machine turn the signature, and the lifters or iingers Q press it down, and the operator places another signature in position for a similar operation, which operation is repeated until the required number of signatures has been sewed and the rear table filled. The backbands are then threaded into the needles preparatory to the removal of the books from the machine.

vVe claim as new and desire to secure by Letters Patent- 1. The combination of the cam-wheels BL B3, bell-crank levers G1 G2, pitman 7i 7L, lugs q g, cylinder E, and block G, substantially as shown and described, for the purpose specitied.

2. The needle-hook R3 pivoted upon the rod R, provided with the slot r4, working upon. the pin T5 of the sleeve R2, all arranged and operating to catch, hold, and carry the interlaeing thread from the first of a series of needles to, and passing the thread over, the last of the series, substantially as shown and described.

3. The block T, provided with an adjustable plug, t, for raising and lowering the needle as may be required by the different thicknesses of paper to be sewed, substantially as shown a-nd described.

4. One or more adjustable guides, a, provided with eccentrics e2, substantially as shown and described, arranged and operating so as to elevate or depress the thread-carrier rod.

5. One or more adjustable guides, a., having a transverse slot, a3, and set-screw a4, in combination with the thread-carrier rod R and the i'rame otI a book-sewing machine, substantially as shown and described, all arranged and operating so as to give to the guides a lateral zuljustment.

(i. The combination ot' guide a., provided with a transverse slot, a?, and with the eccentric a?, with a book-servi11g-machine frame, for the latcralrand vertical adjustment ofthe tlnead-carrier rod, substantially as shown and described.

'7. In a book-sewing machine a bumper, Y, that is laterally and vertically adjustable for receiving` the end ot the thread-carrier rod, in Whatever position it may be adjusted by the guides, substantially as shown and described.

S. The bumper-V, havin g the face-plate Y, with a concavity or bell-shaped mouth, and set-screw y, substantially as shown and described.

9. The combination of the laterallyT and vertically adjustable bumper V, having the face-plate Y, with the thread-carrier It, substantially as shown and described, all arranged and operating to bring the end of the carrier-rod to the proper position for the operation ot" the hook R3 in throwing the thread over the last of the series of. needles.

In testimony that We claiin the foregoing' as our invention, We hereunto affix our signatures this 20th day of January, 1874.

E. G. PARKHURST. HENRY G. THOMPSON.

Witnesses OHAS. E. Guoss, LEWIS SPERRY. 

